Fatal error: Uncaught Error: Interface "core\hook\discovery_agent" not found in /srv/www/htdocs/moodle/lib/tests/fixtures/hook/fakeplugins/hooktest/classes/hooks.php:26 Stack trace: #0 {main} thrown in /srv/www/htdocs/moodle/lib/tests/fixtures/hook/fakeplugins/hooktest/classes/hooks.php on line 26